<?php header("Content-type: text/html; charset=utf-8")?>
<form action="reg.php" method="post">
用户名:<input type="text" name="username"><br>
密码:<input type="password" name="password"><br>
年龄:<input type="text" name="age"><br>
<input type="submit" value="注册"> <input type="reset" value="重新填写"><br>
</form>